Utilities & Calculators
A designer needs a contrast ratio. A developer needs a readable date for 1700000000. An editor needs the height of a 16:9 image that is 1280 px wide.
Convert a HEX color to RGB, HSL and CMYK and check it against WCAG. Calculate ratios with presets for YouTube, TikTok and Instagram. Convert file sizes from B to PB and CSS pixels to rem. Turn UNIX timestamps into local time and other time zones. The password generator draws characters with crypto.getRandomValues and shows the entropy.
Results update while you type, and everything is calculated in your browser.
Secure Password Generator
Generate random passwords of 8 to 64 characters with an entropy readout. The browser creates them locally with crypto.getRandomValues.
UNIX Timestamp & Time Zone Converter
Convert UNIX timestamps in seconds or milliseconds to ISO 8601, UTC and local time, convert a clock time between time zones and compare 15 world cities.
Color Model Converter & WCAG Contrast
Convert a HEX color to RGB, HSL and CMYK and check the contrast ratio of text and background against WCAG 2.1 AA and AAA.
File Size & Unit Converter
Convert file sizes between B, KB, MB, GB, TB, PB, KiB, MiB and GiB, and turn CSS pixels into rem and pt. All results update as you type.
Aspect Ratio Calculator
Enter a ratio such as 16:9 and one side in pixels to get the other side. Presets for YouTube, TikTok, Instagram, 4:3, 21:9 and 3:2.
Color Contrast Checker
Check the WCAG 2.x contrast ratio of a text color on a background and get a nearest passing color when AA fails.